1. Department of Economics, Harvard University, 1805 Cambridge Street, Cambridge, MA 02138 (email: )
2. Department of Economics, University of Illinois at Chicago, 1200 West Harrison Street, Chicago, IL 60607 (email: )
3. Centro de Investigación Económica, Instituto Tecnológico Autónomo de México, Mexico City, Avenida Camino Santa Teresa, 930 Colonia Héroes de Padierna, Magdalena Contreras, 10700 CDMX, Mexico (email: )